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基于同波束干涉的空间三维相对位置测量研究
任天鹏1, 高云鹏2, 谢剑锋1, 杜兰2
1.北京航天飞行控制中心, 北京 100094;2.战略支援部队信息工程大学, 郑州 450052
摘要:
针对深空探测器相对位置精确测量需求,建立了空间三维相对位置测量模型,研究了基于单基线同波束干涉测量(Same-beam VLBI,SBI)的空间三维位置最小二乘解算方法。利用“嫦娥3号”着陆器的测控天线与定向天线的SBI实测数据,验证了测量模型与解算方法的有效性。结果显示:SBI干涉时延随机误差约0.225 ps(0.07 mm);测控天线与定向天线之间距离误差约0.216 m,方向误差约30.4°。该研究结果有望应用于后续深空探测任务譬如“嫦娥5号”器间高精度相对测量中。
关键词:  深空探测;同波束干涉测量;三维测量;相对测量
DOI:10.15982/j.issn.2095-7777.2019.03.003
分类号:P228.4
基金项目:国家自然科学基金资助项目(11403001,41604030)
Same-Beam-Interferometry-Based Spatial 3-D Relative Position Measurement
REN Tianpeng1, GAO Yunpeng2, XIE Jianfeng1, DU Lan2
1.Beijing Aerospace Control Center, Beijing 100094, China;2.Information Engineering University, Zhengzhou 450052, China
Abstract:
To obtain high precision position of spacecraft,a 3-D relative position measurement model is established,and an algorithm to calculate the 3-D position based on a single-baseline same-beam interferometry (SBI) is proposed by using Least squares. SBI measurements between TT&C antenna and directional antenna of Chang'E-3 lander are conducted to verify the proposed model and its calculation algorithm. Results show that the random error of SBI delay is about 0.225 ps (0.07 mm),the distance error between TT&C antenna and directional antenna is about 0.216 m, and the direction error between them is about 30.4°, which will be used for high precision relative measurement between sub-spacecraft of Chang'E-5 and other deep-space exploration missions.
Key words:  deep-space exploration;same-beam interferometry;3-D measurement;relative measurement